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Employee Retirement Plans (Expected Return on Plan Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Share-based Payment Arrangement [Abstract]
Interest cost	$ 1,972	$ 2,327	$ 2,380
Expected return on assets	(2,336)	(2,886)	(3,070)
Net periodic benefit cost (income)	$ (364)	$ (559)	$ (690)

X

- Definition

Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

+ References

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- Definition

Amount of cost recognized for passage of time related to defined benefit plan.

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X

- Definition

Amount of net periodic benefit cost (credit) for defined benefit plan.

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